hisó[ proposal eliminate the state sales tax for anyone buying hybrid or electric vehicle. 3000 dollar savings of a green energy car. gas leap powered vehicle generate 40 percent of the state air pollution. >> great story. 13-year-old girl from fremont got an opportunity to share some of her scientific knowledge with the president today. jessica was among 30 students from across the nation who attended the third white house science fair. met the president. got firsthand look at invention that won the stem competition. that's the nation top science technology engineering and math competition. >> want you to know that you have got a whole country behind you as you pursue your dreams. and your success is going to be our success as well. >> all right? >> way to go. >>reporter: young jessica awarded for her project thaebingt uses led lights to help strengthen tired eye muscle and improve peripheral vision. how impressive is tha that. >> well, then, this. 2 high school students in nova scotia asked canadian astronaut what it would be like to dip a wash cloth into water and then squeeze it. s